Pinpoint Pupils

Question

Pinpoint pupils
A) describe the size of the pupils in a darkened room.
B) are caused by the contraction of the circular muscles of the iris.
C) are caused by mydriatic drugs.
D) are caused by the contraction of the radial muscles of the iris.

Accepted Answer

Pinpoint pupils are caused by the contraction of the circular muscles of the iris, not by the contraction of the radial muscles or the influence of mydriatic drugs, which actually dilate the pupils. The size of the pupils in a darkened room would typically be larger, not pinpoint, to allow more light in.